Installing Bixenon HIDs in 99-04 Ford Mustangs

In this write-up we will be going over the installation of StangMods’ bixenon HID conversion kit for 1999-2004 Ford Mustangs. This kit will increase light output and offer a whiter light for added style.

Tools Required:

8 MM or 5/16 Socket

First you’ll want to remove your stock headlamps from the vehicle. This process can be found through this link. Once your headlamp lenses have been removed, lay your wiring harness along the battery area underneath the hood as shown below.

Run the longer end of the harness over to the passenger side area. It is not important to tuck it away neatlly at this moment.

Now move back over to the driver’s side. There are two O ring connections that need to be made. One is a power (red wire) and ground (black wire). Connect the red O ring terminal to the positive side of the battery. Next, connect the black O ring terminal to a good ground source. We chose the bolt on the inner fenderwell as shown below.

You’ll now be left with three connections to be made on the driver’s side. Tuck them down next to the battery and out through the opening behind the headlamp as shown below.

Route the passenger side harness as shown below.

You can connect the gound O ring for the passenger side to the bolt for the hood prop rod.

Now we will be preparing the bulb for installation. The bixenon bulb has a removable base that must be removed before installing it in the headlamp housing. Simply twist the base counter clockwise and it will be removed. Once the base is removed, place the bulb through the plastic locking collar as shown below.

You can now reattach the base and install the bulb in the housing as shown below.

The final step is to re-attach the plastic locking collar to secure the bixenon bulb in the housing as shown below.

There are three remaining connections to be made on the passenger side. They are all all a simple plug in procedure. Simply match up the corresponding plugs. The final step on the passenger side is to mount your ballast. We chose to mount it on the inner fender as shown below.

At this point, you can zip tie all of the passenger side connections in place. We chose to zip tie the harness directly underneath the radiator shroud as shown below.

Move over to the driver’s side to complete the installation. Plug the stock harness into the blue plug on the driver’s side as shown below. Keep in mind that the stock harness plug on the passenger side is not used.

Tuck the harness connection back through the opening as shown below. You can also tuck your driver’s side ballast back through this opening. It is not necessary to use mounting brackets to secure it as there is limited space for the ballast to move around.

Finally, complete your plug in connections as you did on the passenger side and tuck away the harness around the battery as shown below. Once you have the wires in their desired location, you can use zipties to secure them to existing OEM wires.

All thats left is to re-install your driver’s side headlamp and check the HIDs to ensure they come on.